Enum ResponseMode 

pub enum ResponseMode {
    Basic,
    Interleaved {
        prev_transmit: NtpTimestamp,
    },
}

Which timestamps a response should carry.

Variants

Basic

The ordinary exchange: receive and transmit from this exchange.

Interleaved

Interleaved: the reply carries this exchange’s receive timestamp (so the client can interleave again next time) together with the actual, post-send transmit timestamp of the earlier response the client named in its origin field. That transmit value is the whole point — a basic reply must write its transmit field before the packet leaves, so it can only ever be an estimate.

Two field rules, both of which fail silently rather than loudly when broken (RFC 9769; chrony ntp_core.c lines 1241/1251/1290, 2744-2754):

• origin echoes the request’s receive field, not its transmit — that is how the client recognises an interleaved reply.
• receive is the current exchange’s, not the previous one’s. Reporting the previous receive pairs the client’s T1/T4 with a mismatched T2/T3 and shows up as a delay inflated by exactly one poll interval — measured against chrony as 4.009 s on a 4 s poll.

Fields

prev_transmit: NtpTimestamp

The true transmit timestamp of the response the client’s origin field identifies.

Trait Implementations

impl Clone for ResponseMode

fn clone(&self) -> ResponseMode

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for ResponseMode

impl Debug for ResponseMode

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for ResponseMode

impl PartialEq for ResponseMode

fn eq(&self, other: &ResponseMode) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for ResponseMode